Weighing mechanism



Dec. 16; 1924- 1,519,383

H. l.. MERRICK WEIGHING MECHANISM Filed Feb. 28, 1921 2 Sheets-Sheet l Suva/nto@ @53 711.5 @Hoff/wey H. MERRICK Dec, 16, 1924.

WEIGHING MECHANISM 2 Sheets-Sheee 2 Filed Feb. 28. 3921 y Ilerber LMe rick 771.5

Patented 16, 1924.

UNITED STATES PATENT GFFICE.

HERBERT L. MERBCK. F PASSAEC, NEX-.7 IYERSEY.

"i/"EG'HNG Application le February To (LZ/Z when@ t may concern.'

Be it known that l, Hnni'snnr L. Mnnnroir, a citizen of the United States, and a resident of Passaic, in the county of Passaic and State of New Jersey, have invented certain new and useful improvements in lVeighing Mechanism, of which the following is a specification.

This invention relates to Weighing mechanism, particularly of the type employing a steelyard or scale beam arranged With means to support a load therefrom and having a poise Weight adjustably mounted thereon to counterbalance a load supported by the beam, and it is the object of the invention to provide improved means controlled by the deflection of the scale beam to automatically adjust the poise Weight to ybring the beam into equilibrium to countern valance a load supported thereby.

In carrying out the invention l provide a pivoted scale beam arranged to support a load and having a poise Weight adjustably mounted thereon, said beam carrying` a rotatable friction member having connection with the poise weight to adjust the latter on the beam through the movement of said member, said member being arranged to contact with a rotatable friction face and the positioning of said member relative to said face and the direction of movement thereof being controlled by the deflection of the scale beam.

In the drav-.f'ings accompanying and form-- ing a part oit' this specification, Figure 1 is a front elevation of Weighing mechanism showing an embodiment of my invent-ion.

Figure 2 is an end elevation, partly in section, looking the riht of Figure l.

Figure 3 is a plan view.

Figure lt is a vieiv looking at the right of Figure E2 to show the means to adjust the poise Weight along the beam.

Figure 5 is an enlarged elevational view, partly in section, looking at the front of the friction member carried by the beam; and

Figure 6 is a sectional view taken substantially on the line @#6 of Figure 5.

Similar characters of reference designate like parts throughout the different views of the drawings.

I have shoivn an embodiment of. my invention in the drawings in connection with a platform scale in which the load receiving plat-form (not shown) is connected by a rod 7 to a shackle 8 having eyes for the lVECHANSIVZ.

ii' Se, 1921. Serial No. 448,404. engagement of knife edge pivots 9 projecting laterally from opposite sides at one end of a steelyard or scale beam 10 fulcrumed or pivotally supported intermediate its ends by knife ederpivots 11 projecting from opposite sides of the beam engaging upon bearings in a standard 12 mounted upon a shelf supported upon columns 14. rlhe end of the beam opposite to its connection with the load receiving platform is arranged With graduations and has a poise weight 15 adjustably mounted thereon arranged ivith a pointer 15 to co-operate with, the graduations to indicate the Weight of a load weighed.

To automatically adjust the poise weight along the beam n'hen the beam has been deflected from the horizontal or moved out of equilibrium by the placing of a load upon the load receiver or platform to counterbalance and Weigh such load, or again bring the beam into equilibrium when thel scale beam has been relieved of the load, a friction member is rotatably carried by the beam adjacent at the end opposite to which the load receiving means is connected thereto, this member being in a form of a dis-li 15 lined to one end of a shaft 17 rotatably carried by the beam with the ends projecting from opposite sides thereof. This disk carries a eries of anti-friction rollers 18 disposed around the periphery of the disl; and mounted on ied shafts 19 in recesses 20 in the peripheral portion of the disk with the periphery of the rollers to extend be- `vond the sides and periphery of the disk and to be independently rota-table about an axis extending cireumferentially of the disk (Figures and 6). 'lhe roller shafts 19 are supported at either end in grooves 9i 'in the opposite walls of the recesses 20 and releasably retained therein by pins or screvvs 22 extending transversely of said recesses 21 above the shafts. The rollers 18 are preferably tapered tovvard each end so as to substantially coincide ivith the circunr ference of the disl-z.

The disk is operatively connected to the poise Weight to adjust the latter upon the beam through the movement of the disk bv a band or cable 23 secured at opposite ends to the poise Weight, as at 24, and passing' around a grooved pulley fixed to the shaft 17 at the side of the beam opposite to the dish 16 and a Wheel Q6 rotatably carried bv the beam adjacent its fuif-.ruined support 1l.

lt will be obvious that as the disk 16 is rotated the poise weight will be moved along the beam in one direction by the movement of the disk in one direction and in an opposite direction by the reverse rot-ation of the disk.

To impart rotative niovement to the disk 16 a. friction disk 27 is fixed to a shaft QS journalled in a standard 29 n'iounted upon the. shelf 13 to rotate on an axis parallel with the axis of the pivotal support 11 of the beam and in opposite relation to the friction rollers 1S carried by the disk 16. The friction disk QT is continuously rotated in the direction indicated by the arrow from a suitable som'ce of power and shown s an electric motor M mounted upon the shelf connected to the friction disk by a belt 8() passing around a pulley 31 on the motor shaft and a pulley 32 fixed to the shaft QS of the disk.

ls stated the friction disk QT is mounted in opposed relation to t-he friction roller car-- rying disk 16. The roller carrying disk 16 is carried by the beam to rotate on an axis oblique to the axis of the friction disk 2T and arranged so that in the normal no-load position of equilibrium of the beam the roller 1S at the uppern'iost peripheral portion of the disk 16 will contact with the friction disk 27 at a point coincident with the axis of friction disk Q7. In this position of the disk 16 there will be no tendency of the friction disk 27 to rotate disk 16. To prevent the disk 27 wearing flat surfaces on the rollers 1S the central portion of the face of disk can be depressed so that there will be no contact between disk 27 and rollers 1S until beam moves slightly from its position of equilibrium. As a load is applied to the beam the end of the beam opposite its connection with the load supporting means and upon which the roller carrying disk .is mounted is deflected or moved upward there by moving said disk 16 in a direction transverse to the face of the friction disk 2T and to contact therewith above the axis of rotin tion thereof. In this position of the disks a force is applied to a roller 1S in contact with the friction disk perpendicular to the plane of rotation of said roller and a bodilyY movement thereof across the face of the friction disk occurs and imparts a rotativo movement to the disk 16 and the rollers successively brought into and moved out of contact with the friction disk 27. the rotative movement of disk 16 through itsl connection with the poise weight moving the latter outward on the beam. the poise weight approaches the position to bring the beam into equilibrium the roller carrying` disk 16 is moved in a direction radial of and toward the axis of the friction disk 27 and therein' graduall)Y retarding the rotative movementl of the disk 16 with a consequent retardation in the velocity of the movement of the poise weight upon the beam, and the rollers carried by the disk 16 are brought into position to contact with the friction disk 27 substantiall i axially thereof by mo\` ing the poise weight to position of perfect balanceon the beam to bring the latter into equilibrium with the result that the poise weight will not overrun its correct position for bringing the beam into equilibrium. As the load is removed from the scale beam, due to the forward position of the poise weight, the forward end of the scale beam is deflected to incline downward from the horizontal and the roller carrying disk 16 will be moved to posit-ion a roller carried thereby to contact with the friction disk 2T below the axis of the latter and reverse movement will be imparted to the roller carrying disk 16 and the poise weight adjusted in reverse direction to that hercinbefore described when a load is applied to t-hc scale beam until the beam is again restored to initial position of equilibrium and in position to weigh another load.

It will be noted that the poise weight is adjusted on the beam to counterbalance a load being weighed in a manner similar to that as in ordinary hand weighing, but that the poise weight is automatically moved to correct counterbalancing position, and that when the load is removed from the scale beam the poise weight is again automatically rcturned to initial 11o-load position.

Having thus described my invention l claim:

1. In weighing mechanism, the combination with a weighing beam arranged to support a, load therefrom, of a poise weight movable upon the beam; a member rotatably carried by the beam connected to the poise weight; and means in contimious friction engagen'ient with said rotatabh` member and coacting therewith when the beam is moved out of equilibrium to adjust the poise weight along tlic beam.

In weighing mechanism. the combinar tion with a pivotally supported weighing beam, of a poise weight movable along theI beam, a rotatable friction member carried by the beam operatively connected to the poise weight to move the latter along theI beam during the rotativel movement of said member; and a rotatable disk with which said member frictionallv co-acts when the beam in equilibrium to hold the poise weight against moveimnt and when the beam is moved out of equilibrium to move the poise weight along the beam to a point of perfect balance and bring the beam into equilibrium.

il. In weighing mechanism` the combination with a load sui'iporting scale beam. of a poise weight adjustably mounted upon the beam; an actuator to move the poise loo lll

Weight along the beam; and means continuously in contact with the actuator and frictionaliy coasting with the actuator when tbc beam is moved out of equilibrium to actuate the same to adjust the poise Weight .1 v 1..' -l Y J.- along tne beam to einig trie lattei nuo eouilibrium.

i T u e. In veighmg mecnauisni, me combination with a scale beam, of a poise Weight adjustably mounted upon the beam; a friction member and Wheel rotati bl)Y carried by the beam; connection een i tion said i member, Wheel and counteipoise; and a friction disk with which the friction nienibcr co-aets when the beam is moved out of equilibrium to adjust the poise Weight along the beam to bring the latter into equilibrium,

in Weighing mechanism, the combina-- tion with a scale beam, of a p e Weight adjustabljy mounted upon the beam; a friction member rotatably carried by the beam; a Wheel rotatable with said men'iber; a second wheel rotatably carried by the beam; a cable passing around said wheels and connected to the poise Weight, and a disk to t'rictionally contact ivi'h and actuate the friction member and connected wheels when the beam is moved out of equilibrium for the purpose speciiied.

6. In Weighing mechanism, the con'ibination with a pivotally supported scale beam, of a friction disk supported to rotate on an ruis in a plane parallel with the pivotal support of the scale beam; poise Weight adjustable on the beam; a friction men'iber carried by the beam to rotate in a plane at an angle to the face of the friction disk and with a peripheral portion adapted to have contact Wit-li the disk in line ivith the axis of the disk When the beam is in equilibrium, and to Contact with the disk at one side of the axis thereof When the beam is moved out of equilibrium for the purpose specified.

7. ln weighing mechanism, the combination with a pivotally supported scale beam, of a friction disk supported independent of the beam; a poise 'Weight adjustable on the beam; a friction member rotatably carried by the beam with a peripheral portion adapted to have contact ivith the disk in line with the axis of the disk when the beam is in equilibrium, and to contact With the disk at one side of the axis thereof and have movement imparted thereto in one direction 'when the beam is moved to overload position and to Contact at the opposite side of tne axis of the disk and have movement imparted thereto in Oppo-site direction when the beam is moved to underload position; and means to connect said member to the poise Weight to effect adjustment thereof on the beam tlirough the movement of said member.

8. ln iveighii ff metnanism, the combinai a 3 tion with u piiotally supported scale beam,

of a friction disk supported indepeiulently of the beam; a poise weight adjustable on the beam; and a disk rotatably carried bjr the beam and operatively connected to the poise Weight to adjust the latter on tbc bifam through the movement of the disk, said disk carrying` a series of rollers to ,independentlj.'v rotate about an axis extendino' circumferentially of the disk, and the disk arrzniged with a roller to Contact `with the friction disk in line with the axis of the friction disk When the beam is in equilibrium and to contact With the `friction disk at either side of the axis thereof in accordance uith the deflection of the beam for the purpose specified.

9. In Weighing mechanism, the combination With a pivotally supported scale beam, of a poise Weight adjustable on the beam; a friction member rotatably carried by the beam and having connection with the poise Weight to adjust t-he latter on the beam through the movement of the friction member; and a friction disk to co-act with said friction member to vfrictionally rotate said member in a direction by and in accordance With the deflection of the scale beam to adjust the poise Weight to bring the beam into equilibrium.

10. In Weighing mechanism, the combination with a pivotally supported scale beam arranged to support a load at one side of its pivotal support, of a poise weight adjustably mounted on the beam at the opposite side of its pivotal support; a friction member rotatably carried on the beam; means to connect the poise Weight to said member to adjustsaid Weight upon the beam through the movement of the friction member; and a friction disk supported independent of the beam to rotate on an axis parallel with the axis of the pivotal support of the scale beam and co-act with the friction member when the beam is moved out of equilibrium to transmit movement to said friction member for the purpose specified.

ll. ln Weighing mechanism, the combination with pivotally supported scale beam arranged to support a load at one side of its pivotal support, of a poise Weight adjustably mounted on the beam; a friction disk supported independently of the beam; a friction member carried by the beam to rotate in a plane oblique to the axis of the disk and to have frictional contact With the disk axially thereof with the beam in position of equilibrium Without imparting rotative movement to said member, and to engage With the disk at either side of the axis thereof by and in accordance with the movement of the beam outof equilibrium to permit rotative movement of said member in opposite directions; and means to connecI the friction member to the poise Weight.

l2. In Weighing mechanism, the combinalli) tion with a pivotally supported scale beam arranged to support a load at one side of its pivotal support, of a poise Weight adjustably mounted on tbe beam; a friction disk Supported independent of tbe beam to rotate on an axis parallel with the axis oi' the beam support; a disk carrying a series ot rollers to independently rotate about an axis eX- tending eircumferentially of said disk, said disk being rotatably carried on the beam and opposite the friction disk to rotate on an axis oblique to the axis ot the friction disk with tlie rollers to contact with the tace ot tbe disk in line with tlie axis of llie disk when the beam is in equilibrium and to Contact With the friction disk at either side of the axis tliereo't in accordance with the deflection of tlie beam; a wheel rotatable with the disk carried by the beam; a second Wheel rotatably carried by the beam; and a cable to pass around said wheels and oonneeted to the poise Weight for tbe purpose specified.

Signed at New York city, in the county of New York and State ot New York this l-tli day oli January, 1921.

HERBERT L. MER R l( K 

